If we solve for E (earnings) by dividing the Today's price (13028.16) by PE (15.58), we get a trailing earnings of $836.21. If the Dow Jones website can verify that the trailing earnings of the DJIA is $836.21, then the PE of 15.58 would be correct.

However, Dow Jones also owns Barron's which is reporting a much higher PE of 87.07 based on trailing earnings of $149.16.

Hopefully, someone on ET can find the standard source for this information so everyone is on the same page